True, but there is no law preventing them doing this and so no requirements to do so. You can go to work over here if you test positive as it’s only a recommendation to stay at home for 5 days. Some may say that if they can go to work with Covid and are expected to, then they can go on holiday/vacation with it too. I’m not saying it’s okay, just pointing out the thought process of some passengers. All around you there are positive cases that you are unaware of, and some don’t even know themselves that they are positive - it makes no difference as you can catch it off either category; I think that’s dreaminofcruisin was highlighting.